Improvement in snap-hooks



W. MAIN. Snap-HobkQ I No. 208,250. Patented Sept. 24,1878.

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"$5553, FNOTO-LITHOGRAPNER, WASHINGTON D. C.

UNITED STATES PATENT OEEIoE.

WILLIAM H. MAIN, OF PINE MEADOW, CONNECTICUT.

IMPROVEMENT m SNAP-HOOKS.

Specification forming part of Letters Patent No. 208,250, dated September 24, 1878 application filed April 15, 1878.

To all whom it may concern:

Be it known that 1, WM. H. MAIN, of Pine Meadow, in the county of Litchfield and State of Connecticut, have invented certain new and useful Improvements pertaining to aSnap- Hook, of which the following is a specification, reference being had to the accompanying drawings, \vhere Figure l is a side view. Fig. 2 is a side view, with one side of the hook-body represen ted as broken away, the tongue being shown in the closed position. Fig. 3 is a side view, same as Fig. 2, except the tongue is shown in the opened position. Fig. 4 is a bottom view of the tongue.

This is one of that class of snap-hooks known as locking-snaps.

The letter (6 denotes the hook-bod y, and b the common strap-loop. The tongue I) is pivoted within the hook-body (1, upon the pivotpin c. The tongue is provided with the pivot-slot d,

- through which the pivot-pin 0 runs, permitting the tongue to not only turn on the pivot-pin, but also to have a longitudinal play thereon.

The tongue has underneath the recess e, in which, and preferably around the pivot-pin, is coiled the spring f, one end of which bears upon the bottom of the mortise made in the rear end of the hook-bodyto receive the tongue, and the other end of which enters the notch g, made in the top of the recess 6. The action of this spring is not only to close the tongue,

but also to press it to the rear limit of its 1011- I gitudinal play. The tongue has the shoulder h, hearing, when the tongue is closed, against the shoulder i, which is on the hook-body, in such fashion as to prevent the tongue from being opened till it has first had a longitudinal movement forward. This is the locking feature.

The user or operator, in order to open the tongue, puts his thumb against the thumbpiece j, which projects rearward from the tongue, and by a single continuing impulse pushes the tongue forward, so as to disengage the shoulders h i, and then, bearing upward on the thumb-piece, opens the tongue. When opened the spring f pushes the tongue rearward, so that the cam 70 on the tongue lies on the incline Z, just above the shoulder i, and keeps the tongue opened till purposely closed.

I claim as my improvement- In combination, the hook-body a, provided with the shoulder i rearward of the pivot-pin, the spring f, with one end bearing upon the bottom of the mortise in the hook-body, and the other end bearing upward and backward on the tongue, the pivot-pin c, and the tongue I), provided with the pivot-slot d, the recess 0, the shoulder h rearward of the pivot-pin, and the thumb-piece WILLIAM H. MAIN.

WVitnesses GEORGE D. MAsnER, SAMUEL ALLEN. 

